New global plugin with one SessionStart hook running all checks in-process
(hooks/checks.py, check(ctx) -> CheckResult, single registry). Three states:
ok (silent), note (near-zero-token line, never suppressed), warn (one
aggregated banner, once-per-day snooze + permanent suppress in gitignored
per-project .cc-os/). Initial checks: subagent-model-env-override (catches
the WS1 Cluster 1 incident deterministically), adr-system-present (verbatim
port of os-adr's hook, legacy .os-adr/suppress honored), vault-hub-note-present.
os-adr's own SessionStart hook moved here atomically (its hooks.json now
empty; session_start.py stays as wording source of record). Built via
OpenSpec change add-os-status-plugin; 36 model-free tests; smoke-tested
2026-07-06 incl. env-override canary.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Harness: 6 run-set + 6 frozen-reserve paired scenarios from the WS1 verified
misses, Node relaystation fixture (deterministic sandbox-time logs), headless
runner with CLAUDE_CODE_SUBAGENT_MODEL stub for E1P, deterministic-first
checker driving audit/bin/extract (extended with per-segment read targets),
narrow frozen haiku-judge fallback for E1 language axes, model-free self-test
21/21 incl. shipped-instruction-compliant conformance transcripts.
Wording v2: the E1 canary (counted) proved resolvedModel is not model-visible
in the launch result, so the launch-stub-comparison rule was unactionable;
replaced with subagent model self-report on sonnet/opus spawns (subagents know
their exact model ID - verified live). Scenarios/checker/rubric untouched.
Deterministic env-override detection routed to WS3 (plan updated).
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
- Add session-audit findings (10 stratified sessions, verified synthesis)
and E1-E4 eval-scenario backlog: docs/orchestration-audit/
- Add Phase 1 fact-sheet extractor: plugins/os-orchestration/audit/bin/extract
- Post-audit correction: Cluster 1 (all 23 spawns downgraded to haiku) was
NOT a Fable-5 harness bug — root cause was CLAUDE_CODE_SUBAGENT_MODEL=haiku
in ~/.claude/settings.json env block, set by an earlier session as a cost
measure. Removed 2026-07-06. Policy gap (no verify-resolvedModel rule)
stands regardless; E1 remains valid.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Three workstreams with shared methodology: os-orchestration session
audit (WS1), os-vault write-behavior eval (WS2), and status-check
convention + glue plugin (WS3). Each specifies phases, discipline
gates, and deliverables, following the audit-first and eval-B/C
playbook established in the first batch. To be triggered in separate
future sessions.
jared